CN111635201A - Concrete fast repairing material for road and preparation process thereof - Google Patents
Concrete fast repairing material for road and preparation process thereof Download PDFInfo
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- CN111635201A CN111635201A CN201910737616.XA CN201910737616A CN111635201A CN 111635201 A CN111635201 A CN 111635201A CN 201910737616 A CN201910737616 A CN 201910737616A CN 111635201 A CN111635201 A CN 111635201A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention relates to a rapid concrete patching material for roads and a preparation process thereof, belonging to the technical field of concrete and solving the technical problems of long setting time and lower compressive strength and breaking strength of the rapid concrete patching material for the roads in the prior art in a low-temperature environment. The rapid concrete patching material for the road is cured at a lower temperature, and achieves higher compressive strength and breaking strength.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to a concrete rapid repairing material for roads and a preparation process thereof.
Background
With the rapid development of national economy in China, various highways, bridges and municipal engineering are rapidly constructed. Wherein, the proportion of the cement concrete pavement is obviously increased. Under the repeated action of load, the continuous influence of factors such as freeze-thaw cycle, salt freezing, carbonization and the like in natural environment and the comprehensive action of a plurality of factors such as design, construction, maintenance and the like, the cement concrete pavement inevitably generates various damages during use, such as cracking, pit and groove, cracking and the like, thereby influencing the traffic speed and quality and generating traffic problems. In order to minimize traffic problems, damaged road surfaces must be repaired in time.
However, the application No. 2005100381057 discloses a rapid repair material for ultrathin layers on the surfaces of roads and airfield runways, which has a flexural strength of 2-4 MPa and a compressive strength of 20-30 MPa after 2-3 hours, can achieve excellent flexural strength and compressive strength in a short time, can only be adapted to an environment with a temperature of more than 20 ℃ to maintain a rapid repair speed, but cannot be rapidly solidified in a lower environment.
Disclosure of Invention
The invention aims to provide a rapid concrete patching material for roads, which is used for curing the rapid concrete patching material for the roads at a lower temperature and achieves higher compressive strength and breaking strength.
The technical purpose of the invention is realized by the following technical scheme:
the concrete fast repairing material for road includes (by weight portions) water 120-180 portions, high aluminate quick-hardening cement 1550-2000 portions, silicate cement 200-250 portions, high-molecular polymer 80-125 portions, tartaric acid 4-15 portions, accelerating agent 1545 portions, alunite expanding agent 5-100 portions, polycarboxylic acid water reducing agent 7.2-10.5 portions, admixture 80-150 portions, fine aggregate 2000-2550 portions, special composite additive 5-15 portions, and the special composite additive includes iron powder 12-20 portions, calcium oxide 14-25 portions and hydrophilic colloid 30-50 portions.
By adopting the technical scheme, under the condition that the initial setting time of the rapid concrete patching material for the road is 40 minutes at a lower temperature, the strength of 4h at least reaches 3.4MPa, so that the traffic requirement of opening the road is met, meanwhile, the volume shrinkage rate of the rapid concrete patching material for the road after 28d is reduced by adding the patent additive, simultaneously, the final breaking strength and the compressive strength of the rapid concrete patching material after 6h of solidification are improved by adding the special additive and the high molecular polymer, simultaneously, the recycling of wastes is realized by adding the additive, and the production cost of the rapid concrete patching material is reduced.
More preferably, the raw materials comprise 165 parts of 135-165 parts of water, 1650-1880 parts of high-aluminate quick-hardening cement, 235 parts of Portland cement, 92-115 parts of high polymer, 7-12 parts of tartaric acid, 22.5-38 parts of accelerating agent, 25-70 parts of alunite expanding agent, 8-9.7 parts of polycarboxylic acid water reducing agent, 97-132 parts of admixture, 2100-2380 parts of fine aggregate and 7.5-12.5 parts of special composite additive, wherein the special composite additive comprises 14-18 parts of iron powder, 16-22 parts of calcium oxide and 34-44 parts of hydrophilic colloid.
Preferably, the raw materials comprise 150 parts of water, 1770 parts of high-aluminate quick-setting cement, 225 parts of portland cement, 105 parts of high-molecular polymer, 9 parts of tartaric acid, 30 parts of an accelerator, 45 parts of an alunite expanding agent, 8.9 parts of a polycarboxylic acid water reducing agent, 115 parts of an admixture, 2200 parts of fine aggregate and 10 parts of a special composite additive, wherein the special composite additive comprises 16 parts of iron powder, 18 parts of calcium oxide and 38 parts of hydrophilic colloid.
By adopting the technical scheme, the raw material proportion of the rapid concrete repair material for the road is further optimized, and the raw material proportion of the special composite additive is further optimized, so that the compressive strength and the flexural strength of the rapid concrete repair material for the road after solidification are further improved, and the volume shrinkage rate of the rapid concrete repair material for the road is also at a lower level.
More preferably, the admixture is one or more of fly ash, slag micropowder and silica fume.
By adopting the technical scheme, the fly ash, the slag micro powder and the silica fume are all waste materials in industrial production, and the production cost is reduced under the condition that the compressive strength and the breaking strength of the concrete rapid repair material for roads are not influenced in the using process.
More preferably, the fine aggregate is river sand, and the river sand is continuous-grade river sand with the particle size of 0.65-1 mm.
By adopting the technical scheme, the fine aggregate is further optimized, the compressive strength and the flexural strength are enabled to form an even structure, and the compressive strength, the flexural strength and the smaller positive shrinkage rate of the compressive strength and the flexural strength are further improved.
More preferably, the accelerating agent is one or two of lithium carbonate and lithium chloride.
By adopting the technical scheme, one or two of lithium carbonate and lithium chloride are added, and the initial setting time and the final setting time of the rapid road concrete repair material are further adjusted.
More preferably, the particle size of the alunite expanding agent is 100-300 meshes.
By adopting the technical scheme, the particle size of the alunite is 100-mesh-300-mesh, so that the alunite is fully mixed and then distributed in the concrete repairing material for the road, the concrete repairing material for the road can be uniformly expanded, and the volume change of the concrete repairing material for the road is reduced.
More preferably, the high molecular polymer comprises 75-100 parts of acrylate, 20-40 parts of vinyl ester and 28-43 parts of polyvinyl alcohol fiber.
By adopting the technical scheme, the compressive strength and the breaking strength of the concrete repair material for the road after solidification are increased by the mutual synergistic effect of the acrylic ester and the vinyl ester after the polymerization reaction and the polyvinyl alcohol fiber.
More preferably, the high molecular polymer is prepared by the following method: adding acrylic ester and vinyl ester into water, stirring and mixing uniformly, then adding polyvinyl alcohol fiber, stirring uniformly, keeping at 80-90 ℃, standing and soaking for 1-2h, cooling to 20-30 ℃, stirring for 5-10min, filtering, drying, grinding, and screening to obtain the 100-mesh and 200-mesh high polymer.
By adopting the technical scheme, the emulsion formed after the polymerization of the acrylate and the vinyl ester is relatively uniform, the polyvinyl alcohol fiber is added, and the mixture is heated to 80-90 ℃ to be combined together to be soft.
The second purpose of the invention is to provide a preparation process for preparing the rapid concrete patching material for the road, which has the advantages of simple preparation method and uniform mixing.
The technical purpose of the invention is realized by the following technical scheme:
a preparation process for preparing the concrete rapid repairing material for the road comprises the following steps: (1) uniformly mixing tartaric acid, a polycarboxylic acid water reducing agent, an accelerating agent and water to obtain a mixed solution, and evenly dividing the mixed solution into three parts for later use; (2) uniformly mixing the high-aluminate quick-hardening cement, the Portland cement, the high-molecular polymer, the admixture and the fine aggregate, then sequentially adding three parts of mixed solution, continuously stirring and uniformly mixing, sequentially adding the alunite expanding agent and the special composite additive after adding the three parts of mixed solution, and uniformly stirring to obtain the concrete quick-repairing material for roads.
By adopting the technical scheme, the high-aluminate quick-hardening cement, the portland cement, the high polymer, the admixture and the fine aggregate are firstly dry-mixed and uniformly mixed, so that the mixing efficiency is accelerated, the admixture and the fine aggregate are uniformly mixed, and then the three parts of mixed solution are sequentially added, so that the uniformity of the concrete quick repair material for roads is improved, and the preparation method is simple.
In conclusion, the invention has the following beneficial effects:
firstly, at a lower temperature, under the condition that the initial setting time of the rapid concrete patching material for the road is 40 minutes, the strength of 4h at least reaches 3.4MPa, so that the traffic requirement of opening the road is met, meanwhile, the volume shrinkage rate of the rapid concrete patching material for the road after 28d is reduced by adding a patent additive, meanwhile, the final breaking strength and the compressive strength of the rapid concrete patching material after 6h solidification are improved by adding a special additive and a high molecular polymer, meanwhile, the recycling of wastes is realized by adding the additive, and the production cost of the rapid concrete patching material is reduced.
Secondly, through the synergistic effect of the iron powder, the calcium oxide and the hydrophilic colloid, the rapid road concrete patching material can have a long-time temperature maintaining process, and meanwhile, the road concrete can have high concrete breaking strength and concrete compressive strength in a low-temperature environment, and the volume shrinkage rate of the concrete is small.
Thirdly, the acrylic ester, the vinyl ester and the polyvinyl alcohol fiber are added into the rapid concrete repair material for the road, and the compressive strength and the breaking strength of the cured rapid concrete repair material are improved through the synergistic effect of the acrylic ester, the vinyl ester and the polyvinyl alcohol fiber.
Detailed Description
The present invention will be described in further detail with reference to examples. It should be understood that the preparation methods described in the examples are only for illustrating the present invention and are not to be construed as limiting the present invention, and that the simple modifications of the preparation methods of the present invention based on the concept of the present invention are within the scope of the present invention as claimed.
TABLE 1 content (unit: Kg) of each raw material in the high-molecular polymer
| High molecular polymer | A | II | III | Fourthly | Five of them |
| Acrylic esters | 75 | 80 | 87 | 93 | 100 |
| Vinyl esters | 20 | 25 | 30 | 35 | 40 |
| Polyvinyl alcohol fiber | 43 | 38 | 35 | 31 | 28 |
TABLE 2 contents (Kg unit) of raw materials in the special compound admixture
| Special composite additive | A | II | III | Fourthly | Five of them |
| Iron powder | 12 | 14 | 16 | 18 | 20 |
| Calcium oxide | 14 | 16 | 18 | 22 | 25 |
| Hydrophilic colloid | 30 | 34 | 38 | 44 | 50 |
Table 3 examples of the contents (unit: Kg) of the respective raw materials in the concrete quick-repair material for roads
| Examples | 1 | 2 | 3 | 4 | 5 |
| Water (W) | 120 | 135 | 150 | 165 | 180 |
| High aluminate quick hardening cement | 1550 | 1660 | 1770 | 1880 | 2000 |
| Portland cement | 200 | 210 | 225 | 235 | 250 |
| Tartaric acid | 4 | 7 | 9 | 12 | 15 |
| Accelerating agent | 15 | 22.5 | 30 | 38 | 45 |
| Alunite expanding agent | 5 | 25 | 45 | 70 | 100 |
| Polycarboxylic acid water reducing agent | 7.2 | 8 | 8.9 | 9.7 | 10.5 |
| Blending material | 80 | 97 | 115 | 132 | 150 |
| Fine aggregate | 2000 | 2100 | 2200 | 2380 | 2550 |
| High molecular polymer one | 80 | - | - | - | - |
| High molecular polymer II | - | 92.5 | - | - | - |
| High molecular polymer III | - | - | 105 | - | - |
| High molecular polymer IV | - | - | - | 115 | - |
| High molecular polymer five | - | - | - | - | 125 |
| Special composite additive | 5 | - | - | - | - |
| Special composite additive II | - | 7.5 | - | - | - |
| Special composite additive III | - | - | 10 | - | - |
| Special composite additive IV | - | - | - | 12.5 | - |
| Special composite additive five | - | - | - | - | 15 |
Example 1
Concrete rapid repairing material for road
(1) Uniformly mixing tartaric acid, a polycarboxylic acid water reducing agent, lithium carbonate and water to obtain a mixed solution, and averagely dividing the mixed solution into three parts for later use;
(2) uniformly mixing high-aluminate quick-hardening cement, portland cement, a high-molecular polymer, continuous river sand with the particle size of 0.65-1mm and fly ash, sequentially adding three parts of mixed solution, continuously stirring and uniformly mixing, sequentially adding 100-mesh 300-mesh alunite expanding agent and a special composite additive after adding the three parts of mixed solution, and uniformly stirring to obtain the rapid concrete repair material for roads.
Wherein, the high molecular polymer is prepared by the following method: adding acrylic ester and vinyl ester into water, stirring and uniformly mixing, then adding polyvinyl alcohol fiber, uniformly stirring, keeping at 80 ℃, standing and soaking for 2h, cooling to 20 ℃, stirring for 5min, filtering, drying, grinding, and screening to obtain the 100-mesh 200-mesh high polymer.
The special composite additive is prepared by the following method: heating carrageenan to 40 ℃ to enable the carrageenan to be viscous liquid, continuously stirring in the heating process, adding iron powder and calcium oxide into the heated carrageenan, then spreading the viscous liquid, cooling to 15 ℃ to form solid, crushing, grinding and screening to obtain the special composite additive powder with the particle size of 150 plus 200 meshes.
Example 2
Concrete rapid repairing material for road
(1) Uniformly mixing tartaric acid, a polycarboxylic acid water reducing agent, lithium carbonate and water to obtain a mixed solution, and averagely dividing the mixed solution into three parts for later use;
(2) uniformly mixing high-aluminate quick-hardening cement, portland cement, a high-molecular polymer, continuous river sand with the particle size of 0.65-1mm and slag micro powder, sequentially adding three parts of mixed solution, continuously stirring and uniformly mixing, sequentially adding 100-mesh 300-mesh alunite expanding agent and a special composite additive after adding the three parts of mixed solution, and uniformly stirring to obtain the concrete quick repairing material for the road.
Wherein, the high molecular polymer is prepared by the following method: adding acrylic ester and vinyl ester into water, stirring and mixing uniformly, then adding polyvinyl alcohol fiber, stirring uniformly, keeping at 85 ℃, standing and soaking for 1.5h, cooling to 25 ℃, stirring for 8min, filtering, drying, grinding, and screening to obtain the 100-mesh 200-mesh high polymer.
The special composite additive is prepared by the following method: heating carrageenan to 50 ℃ to enable the carrageenan to be viscous liquid, continuously stirring in the heating process, adding iron powder and calcium oxide into the heated carrageenan, then spreading the viscous liquid, cooling to 20 ℃ to form solid, crushing, grinding, and screening to obtain the special composite additive powder with the particle size of 150 plus 200 meshes.
Example 3
Concrete rapid repairing material for road
(1) Uniformly mixing tartaric acid, a polycarboxylic acid water reducing agent, lithium chloride and water to obtain a mixed solution, and averagely dividing the mixed solution into three parts for later use;
(2) uniformly mixing high-aluminate quick-hardening cement, portland cement, a high-molecular polymer, continuous river sand with the particle size of 0.65-1mm and silica fume, sequentially adding three parts of mixed solution, continuously stirring and uniformly mixing, sequentially adding 100-mesh 300-mesh alunite expanding agent and a special composite additive after adding the three parts of mixed solution, and uniformly stirring to obtain the rapid concrete repair material for roads.
Wherein, the high molecular polymer is prepared by the following method: adding acrylic ester and vinyl ester into water, stirring and uniformly mixing, then adding polyvinyl alcohol fiber, uniformly stirring, keeping at 90 ℃, standing and soaking for 1h, cooling to 30 ℃, stirring for 10min, filtering, drying, grinding, and screening to obtain the 100-mesh 200-mesh high polymer.
The special composite additive is prepared by the following method: heating carrageenan to 45 ℃ to enable the carrageenan to be viscous liquid, continuously stirring in the heating process, adding iron powder and calcium oxide into the heated carrageenan, then spreading the viscous liquid, cooling to 25 ℃ to form solid, crushing, grinding, and screening to obtain the special composite additive powder with the particle size of 150 plus 200 meshes.
Example 4
Concrete rapid repairing material for road
(1) Uniformly mixing tartaric acid, a polycarboxylic acid water reducing agent, lithium chloride, lithium carbonate and water to obtain a mixed solution, and averagely dividing the mixed solution into three parts for later use;
(2) uniformly mixing high-aluminate quick-hardening cement, portland cement, a high-molecular polymer, continuous river sand with the particle size of 0.65-1mm, silica fume and slag micropowder, sequentially adding three parts of mixed solution, continuously stirring and uniformly mixing, sequentially adding 100-mesh 300-mesh alunite expanding agent and a special composite additive after adding the three parts of mixed solution, and uniformly stirring to obtain the concrete quick repair material for the road.
Wherein, the high molecular polymer is prepared by the following method: adding acrylic ester and vinyl ester into water, stirring and mixing uniformly, then adding polyvinyl alcohol fiber, stirring uniformly, keeping at 88 ℃, standing and soaking for 1.2h, cooling to 28 ℃, stirring for 9min, filtering, drying, grinding, and screening to obtain the 100-mesh 200-mesh high polymer.
The special composite additive is prepared by the following method: heating gelatin to 42 ℃ to enable carrageenan to be viscous liquid, continuously stirring in the heating process, adding iron powder and calcium oxide into the heated carrageenan, spreading the viscous liquid, cooling to 22 ℃ to form solid, crushing, grinding and screening to obtain the special composite additive powder with the particle size of 150 plus 200 meshes.
Example 5
Concrete rapid repairing material for road
(1) Uniformly mixing tartaric acid, a polycarboxylic acid water reducing agent, lithium carbonate and water to obtain a mixed solution, and averagely dividing the mixed solution into three parts for later use;
(2) uniformly mixing high-aluminate quick-hardening cement, portland cement, a high-molecular polymer, continuous river sand with the particle size of 0.65-1mm, fly ash and slag micropowder, sequentially adding three parts of mixed solution, continuously stirring and uniformly mixing, sequentially adding 100-mesh 300-mesh alunite expanding agent and a special composite additive after adding the three parts of mixed solution, and uniformly stirring to obtain the concrete quick repair material for the road.
Wherein, the high molecular polymer is prepared by the following method: adding acrylic ester and vinyl ester into water, stirring and mixing uniformly, then adding polyvinyl alcohol fiber, stirring uniformly, keeping at 83 ℃, standing and soaking for 1.8h, cooling to 22 ℃, stirring for 7min, filtering, drying, grinding, and screening to obtain the 100-mesh 200-mesh high polymer.
The special composite additive is prepared by the following method: heating gelatin to 48 ℃ to enable carrageenan to be viscous liquid, continuously stirring in the heating process, adding iron powder and calcium oxide into the heated carrageenan, spreading the viscous liquid, cooling to 28 ℃ to form solid, crushing, grinding and screening to obtain the special composite additive powder with the particle size of 150 plus 200 meshes.
Comparative example 1
The difference between the comparative example 1 and the example 3 is that no carrageenan is added in the raw materials of the special composite additive for preparing the concrete rapid repair material for roads.
Comparative example 2
The difference between the comparative example 2 and the example 3 is that the raw materials of the special composite additive for preparing the concrete rapid repair material for the road are not added with iron powder and calcium oxide.
Comparative example 3
The difference between the comparative example 3 and the example 3 is that the special composite additive is not added in the raw materials for preparing the concrete rapid repair material for the road.
Comparative example 4
The comparative example 4 is different from the example 3 in that polyvinyl alcohol fibers are not added to the raw material of the high molecular polymer for preparing the concrete express patching material for roads.
Comparative example 5
The difference between the comparative example 5 and the example 3 is that the raw materials of the high molecular polymer for preparing the concrete rapid repair mix for roads are not added with acrylic ester and vinyl ester.
Comparative example 6
Comparative example 6 is different from example 3 in that a high molecular polymer is prepared by directly mixing acrylic ester, vinyl ester, polyvinyl alcohol fiber.
Comparative example 7
The comparative example 7 is different from the example 3 in that silica fume is not added to the raw materials for preparing the concrete express patching material for roads.
Evaluation of concrete rapid repairing material for road
The following performance tests were carried out on the concrete rapid repair materials for roads prepared in examples 1 to 5 and comparative examples 1 to 7, and the test structures are shown in table 4. According to concrete admixture (GB8076-2008), the fluidity and the setting time of the concrete rapid repair material are tested at 5 +/-1 ℃, the compressive strength and the flexural strength of the concrete rapid repair material are tested at 5 +/-1 ℃ according to a concrete flexural and compressive strength test method in highway engineering cement and cement concrete test regulations, and the volume shrinkage of the concrete rapid repair material 28d is tested.
TABLE 4 test results
As can be seen from Table 4, the strength of 4h of the rapid road patching material reaches at least 3.4MPa under the condition that the initial setting time of the rapid road patching material is 40 minutes at a lower temperature, so that the traffic requirement of opening a highway is met, the volume shrinkage rate of the rapid road patching material after 28d is reduced by adding the patent additive, the final breaking strength and the compressive strength of the rapid road patching material after 6h are improved by adding the special additive and the high molecular polymer, the recycling of wastes is realized by adding the additive, and the production cost of the rapid road patching material is reduced.
By comparing the example 3 with the comparative examples 1 to 3, the comparative example 1 is different from the example 3 in that carrageenan is not added in the raw materials of the special composite additive for the concrete rapid repair material for roads; the difference between the comparative example 2 and the example 3 is that the raw materials of the special composite additive for preparing the concrete rapid repair material for the road are not added with iron powder and calcium oxide; the comparative example 3 is different from the example 3 in that a special composite additive is not added to the raw materials for preparing the concrete rapid repair mix for roads, and thus it can be seen that the concrete rapid repair mix for roads of the present invention, the special composite additive is slowly released through the carrageenan, so that the concrete rapid repair material is cured at a proper temperature through the special composite additive, the initial setting time of the concrete rapid repair material is advanced, and can reach the rupture strength of 3.2MPa in 2h and the compressive strength of more than 35MPa in 4h under the condition of lower temperature, meanwhile, although the special compound additive without carrageenan in the raw materials of the concrete rapid repair material can advance the initial setting time and the final setting time, but has great influence on the 28d volume shrinkage rate, and simultaneously the flexural strength and the compressive strength of the concrete rapid repair material are greatly reduced.
By comparing example 3 with comparative examples 4 to 6, comparative example 4 is different from example 3 in that polyvinyl alcohol fibers are not added to the raw material of the high molecular polymer of the concrete rapid repair mix; the difference between the comparative example 5 and the example 3 is that the raw materials of the high molecular polymer of the concrete rapid repair material are not added with acrylic ester and vinyl ester; comparative example 6 is different from example 3 in that a high molecular polymer is prepared by directly mixing acrylic ester, vinyl ester and polyvinyl alcohol fibers; therefore, the high-molecular polymer is added into the concrete rapid repair material, so that the compressive strength and the breaking strength of the concrete rapid repair material for roads are obviously improved, the acrylic ester, the vinyl ester and the polyvinyl alcohol fibers are mutually synergistic, the acrylic ester, the vinyl ester and the polyvinyl alcohol fibers are fully mixed to form a grid structure, the connection strength of the concrete rapid repair material is improved, and meanwhile, the protective film on the surface of the concrete rapid repair material is formed by the acrylic ester and the vinyl ester, so that the protection of the concrete rapid repair material is improved.
By comparing the example 3 with the comparative example 7, and the comparative example 7 is different from the example 3 in that no admixture is added to the raw material of the concrete rapid repair material, so that it can be seen that the silica fume is added to the raw material of the concrete rapid repair material for roads, thereby further improving the compressive strength and the flexural strength of the concrete rapid repair material.
Claims (10)
1. The utility model provides a concrete quick patching material for road which characterized in that: the special composite additive comprises, by weight, 180 parts of 120-180 parts of water, 2000 parts of 1550-2000 parts of high-aluminate quick-hardening cement, 250 parts of 200-250 parts of Portland cement, 80-125 parts of high polymer, 4-15 parts of tartaric acid, 15-45 parts of accelerator, 5-100 parts of alunite expanding agent, 7.2-10.5 parts of polycarboxylic acid water reducer, 80-150 parts of admixture, 2000-2550 parts of fine aggregate and 5-15 parts of special composite additive, wherein the special composite additive comprises 12-20 parts of iron powder, 14-25 parts of calcium oxide and 30-50 parts of hydrophilic colloid.
2. The rapid concrete repair mix for roads of claim 1, wherein: the material comprises 165 parts of 135-grade sand-water, 1650-grade high-aluminate quick-hardening cement, 235 parts of Portland cement, 92-115 parts of high polymer, 7-12 parts of tartaric acid, 22.5-38 parts of accelerating agent, 25-70 parts of alunite expanding agent, 8-9.7 parts of polycarboxylic acid water reducer, 97-132 parts of admixture, 2100-grade fine aggregate, 2380 parts of special composite additive, and 7.5-12.5 parts of special composite additive, wherein the special composite additive comprises 14-18 parts of iron powder, 16-22 parts of calcium oxide and 34-44 parts of hydrophilic colloid.
3. The rapid concrete repair mix for roads of claim 1, wherein: the material comprises 150 parts of water, 1770 parts of high aluminate quick-setting cement, 225 parts of portland cement, 105 parts of high molecular polymer, 9 parts of tartaric acid, 30 parts of an accelerator, 45 parts of an alunite expanding agent, 8.9 parts of a polycarboxylic acid water reducing agent, 115 parts of an admixture, 2200 parts of fine aggregate and 10 parts of a special composite additive, wherein the special composite additive comprises 16 parts of iron powder, 18 parts of calcium oxide and 38 parts of hydrophilic colloid.
4. The rapid concrete repair mix for roads of claim 1, wherein: the admixture is one or more of fly ash, slag micropowder and silica fume.
5. The rapid concrete repair mix for roads of claim 1, wherein: the fine aggregate is river sand, and the river sand is continuous-grade river sand with the grain size of 0.65-1 mm.
6. The rapid concrete repair mix for roads of claim 1, wherein: the accelerating agent is one or two of lithium carbonate and lithium chloride.
7. The rapid concrete repair mix for roads of claim 1, wherein: the particle size of the alunite expanding agent is 100-300 meshes.
8. The rapid concrete repair mix for roads of claim 1, wherein: the high molecular polymer comprises 75-100 parts of acrylic ester, 20-40 parts of vinyl ester and 28-43 parts of polyvinyl alcohol fiber.
9. The rapid concrete patching material for roads of claim 8, wherein: the high molecular polymer is prepared by the following method: adding acrylic ester and vinyl ester into water, stirring and mixing uniformly, then adding polyvinyl alcohol fiber, stirring uniformly, keeping at 80-90 ℃, standing and soaking for 1-2h, cooling to 20-30 ℃, stirring for 5-10min, filtering, drying, grinding, and screening to obtain the 100-mesh and 200-mesh high polymer.
10. A process for preparing a concrete rapid repair mix for roads as claimed in any one of claims 1 to 9, wherein: the method comprises the following steps:
(1) uniformly mixing tartaric acid, a polycarboxylic acid water reducing agent, an accelerating agent and water to obtain a mixed solution, and evenly dividing the mixed solution into three parts for later use;
(2) uniformly mixing the high-aluminate quick-hardening cement, the Portland cement, the high-molecular polymer, the admixture and the fine aggregate, then sequentially adding three parts of mixed solution, continuously stirring and uniformly mixing, sequentially adding the alunite expanding agent and the special composite additive after adding the three parts of mixed solution, and uniformly stirring to obtain the concrete quick-repairing material for roads.
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| CN114230220A (en) * | 2021-12-31 | 2022-03-25 | 四川赢盛化工有限公司 | Additive composition agent of liquid quick repairing material and application of additive composition agent in cement concrete |
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| KR101814725B1 (en) * | 2017-07-07 | 2018-01-04 | 주식회사 삼한개발 | Shrinkage-reducing and rapid-hardening cement concrete composition having excellent durability and repairing method of road pavement therewith |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114230220A (en) * | 2021-12-31 | 2022-03-25 | 四川赢盛化工有限公司 | Additive composition agent of liquid quick repairing material and application of additive composition agent in cement concrete |
| CN114230220B (en) * | 2021-12-31 | 2023-05-16 | 绵阳市安州区荣盛建材有限公司 | Additive composition of quick repairing material and application of additive composition in cement concrete |
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| CN111635201B (en) | 2022-06-14 |
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